2017

http://d2ouvy59p0dg6k.cloudfront.net/img/seoul_510409.jpg

'Earth Hour City Challenge 2015', (WWF), , . 163 16 . : 2020 10 . 20% . 8 13 2017 .
:
http://wwf.panda.org/wwf_news/?243831/Seoul-succeeds-in-WWFs-Earth-Hour-City-Challenge-2015



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